Answer:

There are only two species of bottlenose dolphins, the Common Bottlenose Dolphin (Tursiops truncatus) and the Indo-Pacific Bottlenose Dolphin (Tursiops aduncus).

Also, there are two recognized subspecies of Tursiops Truncatus:

The Pacific Bottlenose Dolphin (Tursiops Truncatus Gillii) which lives in the Pacific ocean.

The Black Sea Bottlenose Dolphin (Tursiops truncatus Ponticus) which lives in the Black Sea.